74HC21 Dual 4-input AND gate Rev. 8 8 September 2021 Product data sheet 1. General description The 74HC21 is a dual 4-input AND gate. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of V . CC 2. Features and benefits Wide supply voltage range from 2.0 to 6.0 V CMOS low power dissipation High noise immunity Latch-up performance exceeds 100 mA per JESD 78 Class II Level B CMOS input levels Complies with JEDEC standards: JESD8C (2.7 V to 3.6 V) JESD7A (2.0 V to 6.0 V) ESD protection: HBM JESD22-A114E exceeds 2000 V MM JESD22-A115-A exceeds 200 V Specified from -40 C to +85 C and from -40 C to +125 C. 3. Ordering information Table 1. Ordering information Type number Package Temperature range Name Description Version 74HC21D -40 C to +125 C SO14 plastic small outline package 14 leads SOT108-1 body width 3.9 mm 74HC21PW -40 C to +125 C TSSOP14 plastic thin shrink small outline package 14 leads SOT402-1 body width 4.4 mm 4. Functional diagram 1A 1 1A 1 1B 2 1Y 1B 6 2 1C 1Y 4 6 1C 4 1D 5 1D 5 2A 9 2A 9 2B 10 2Y 2B 8 10 2C 2Y 12 8 2C 12 2D 13 2D 13 001aab975 001aab973 Fig. 1. Functional diagram Fig. 2. Logic symbolNexperia 74HC21 Dual 4-input AND gate & 1 2 6 A 4 5 B & 9 Y 10 8 C 12 13 D 001aab974 001aab976 Fig. 3. IEC Logic symbol Fig. 4. Logic diagram 5. Pinning information 5.1. Pinning 74HC21 1A 1 14 V CC 74HC21 1B 2 13 2D 1A 1 14 V n.c. 3 12 2C CC 2 13 1B 2D 1C 4 11 n.c. 3 12 n.c. 2C 1C 4 11 n.c. 1D 5 10 2B 5 10 1D 2B 1Y 6 9 2A 6 1Y 9 2A GND 7 8 2Y GND 7 8 2Y 001aab972 001aai659 Fig. 5. Pin configuration SOT108-1 (SO14) Fig. 6. Pin configuration SOT402-1 (TSSOP14) 5.2. Pin description Table 2. Pin description Symbol Pin Description 1A, 1B, 1C, 1D 1, 2, 4, 5 data input n.c. 3, 11 not connected 1Y 6 data output GND 7 ground (0 V) 2Y 8 data output 2A, 2B, 2C, 2D 9, 10, 12, 13 data input V 14 supply voltage CC 74HC21 All information provided in this document is subject to legal disclaimers. Nexperia B.V. 2021. All rights reserved Product data sheet Rev. 8 8 September 2021 2 / 11